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nixos-rebuild: invoke sudo on non-root switch #50468

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nixos-rebuild: invoke sudo on non-root switch #50468

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zimbatm
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@zimbatm zimbatm commented Nov 16, 2018

This allows to invoke nixos-rebuild switch from a user's account that
has the right to run sudo.

This is useful in scenarios where the configuration.nix is checked out
somewhere in the user's home.

NIXOS_CONFIGURATION=$HOME/path/to/configuration.nix nixos-rebuild switch
Motivation for this change
Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Fits CONTRIBUTING.md.

@zimbatm
nixos-rebuild: invoke sudo on non-root switch
072d202 
This allows to invoke `nixos-rebuild switch` from a user's account that
has the right to run `sudo`.

This is useful in scenarios where the configuration.nix is checked out
somewhere in the user's home.

    NIXOS_CONFIGURATION=$HOME/path/to/configuration.nix nixos-rebuild switch
@zimbatm zimbatm closed this Nov 21, 2018
@zimbatm zimbatm deleted the nixos-rebuild-sudo branch November 21, 2018 14:36
@rickynils
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@zimbatm Why was this closed? Was there some problem with it?

One benefit I see with it is that the nix build is performed as a non-privileged user. And, for example, if you use builtins.fetchGit, the non-privileged user's cache directory is used, instead of the root user's cache. In my case, I have /root on tmpfs, invalidating root's cache on each reboot...

@zimbatm
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zimbatm commented Nov 28, 2018

@rickynils it works great! :)

Eelco expressed (in chat) that he doesn't like having implicit sudo calls and I didn't have more energy to spend convincing that it's a good thing to have.

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@infinisil infinisil Awaiting requested review from infinisil

@rickynils rickynils Awaiting requested review from rickynils

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6.topic: nixos 8.has: module (update) 10.rebuild-darwin: 0 10.rebuild-linux: 1-10
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